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Titolo:
Theory of pressure-driven transport of neutral solutes and ions in porous ceramic nanofiltration membranes
Autore:
Palmeri, J; Blanc, P; Larbot, A; David, P;
Indirizzi:
Univ Montpellier 2, ENSCM, CNRS UMR 5635, LMPM, F-34296 Montpellier 5, France Univ Montpellier 2 Montpellier France 5 M, F-34296 Montpellier 5, France
Titolo Testata:
JOURNAL OF MEMBRANE SCIENCE
fascicolo: 2, volume: 160, anno: 1999,
pagine: 141 - 170
SICI:
0376-7388(19990722)160:2<141:TOPTON>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPACE-CHARGE MODEL; REVERSE-OSMOSIS; ULTRAFILTRATION MEMBRANES; MICROPOROUS MEMBRANES; HYPERFILTRATION; ELECTROLYTES; PERMEABILITY; PERFORMANCE; NANOFILTERS; PREDICTION;
Keywords:
theory; electro-transport; membrane potentials; nanofiltration; ceramic membranes;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Palmeri, J Univ Montpellier 2, ENSCM, CNRS UMR 5635, LMPM, 8 Rue Ecole Normale, F-34296 Montpellier 5, France Univ Montpellier 2 8 Rue Ecole Normale Montpellier France 5 ce
Citazione:
J. Palmeri et al., "Theory of pressure-driven transport of neutral solutes and ions in porous ceramic nanofiltration membranes", J MEMBR SCI, 160(2), 1999, pp. 141-170

Abstract

Hindered transport theory and homogeneous electro-transport theory are used to calculate the limiting, high volume flux, rejection of, respectively, neutral solutes and binary electrolytes by granular porous nanofiltration membranes. For ceramic membranes prepared from metal oxides it is proposed that the membrane structural and charge parameters entering into the theory,namely the effective pore size and membrane charge density, can be estimated from independent measurements: the pore radius from the measured hydraulic radius using a model of sintered granular membranes and the effective membrane charge density from the hydraulic radius and the electrophoretic mobility measurements on the ceramic powder used to prepare the membrane. The electro-transport theory adopted here is valid when the membrane surface charge density is low enough and the pore radius is small enough for there tobe strong electrical double layer overlap in the pores. Within this approximation the filtration streaming potential is also derived for binary electrolytes. (C) 1999 Elsevier Science B.V. All rights reserved.

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Documento generato il 13/07/20 alle ore 07:40:02